diff --git a/pyproject.toml b/pyproject.toml
index fa09a76..fa91389 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -46,7 +46,7 @@ llm = ["anthropic>=0.80.0"]
 mcp = ["mcp[cli]>=1.0.0,<2"]  # mesmo teto do bloco `dependencies` — ver nota lá
 api = ["fastapi>=0.115.0", "uvicorn>=0.34.0"]
 spatial = ["umap-learn>=0.5.0", "hdbscan>=0.8.0"]
-langchain = ["langchain-core>=0.3.0"]
+langchain = ["langchain-core>=1.5.3"]
 all = ["imi-memory[llm]", "imi-memory[mcp]", "imi-memory[api]", "imi-memory[langchain]", "imi-memory[spatial]"]
 dev = [
     "pytest>=8.0.0",
diff --git a/uv.lock b/uv.lock
index ad0edb6..22e5c6b 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1138,7 +1138,7 @@ requires-dist = [
     { name = "imi-memory", extras = ["llm"], marker = "extra == 'all'" },
     { name = "imi-memory", extras = ["mcp"], marker = "extra == 'all'" },
     { name = "imi-memory", extras = ["spatial"], marker = "extra == 'all'" },
-    { name = "langchain-core", marker = "extra == 'langchain'", specifier = ">=0.3.0" },
+    { name = "langchain-core", marker = "extra == 'langchain'", specifier = ">=1.5.3" },
     { name = "mcp", extras = ["cli"], specifier = ">=1.0.0,<2" },
     { name = "mcp", extras = ["cli"], marker = "extra == 'mcp'", specifier = ">=1.0.0,<2" },
     { name = "numpy", specifier = ">=1.26.0" },
@@ -1346,7 +1346,7 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "1.5.2"
+version = "1.5.3"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "jsonpatch" },
@@ -1359,9 +1359,9 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "uuid-utils" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/6e/58/3ad53096eee1e07728e8219ded30ae308b0f2b8b7b26b8ebb6371917c0f5/langchain_core-1.5.2.tar.gz", hash = "sha256:2d13ab35b42eec63d4669a483776b8cdd778ee764107149369fb369d84c08c41", size = 972322, upload-time = "2026-07-28T16:38:37.977Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/65/3e/63af6b9d76d9be907c7c524d6ec18a2efed7e0e2d123fea0230d78dbd73f/langchain_core-1.5.3.tar.gz", hash = "sha256:a56457ac444fef41e9404443c187f0ecea708d36e816ea4ba9573c027f7d1a2d", size = 972461, upload-time = "2026-07-30T14:55:55.833Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/ca/e4/024e402a65f5ee2eb6ae9667b5ffc5f08776cb4e712f5a11ee1997d56083/langchain_core-1.5.2-py3-none-any.whl", hash = "sha256:a687dd7c3b22c6c1294e1c1eeb61fb6f3a308e6015a1d75b576b3836ad5b5aed", size = 561643, upload-time = "2026-07-28T16:38:36.38Z" },
+    { url = "https://files.pythonhosted.org/packages/36/e6/c7c39efe0bc7e1b7c3d8f54f85846e04c901913c3d3e99068b218558c6f1/langchain_core-1.5.3-py3-none-any.whl", hash = "sha256:48b56fa580277209594dd7baf837f5b9a2a3651613f34ff9fb1728b429df015f", size = 561687, upload-time = "2026-07-30T14:55:54.419Z" },
 ]
 
 [[package]]